Adam (19) and Emily (18) were in a Barnes & Noble bookstore a few weeks ago when they stumbled upon the bestseller book of poetry from Rupi Kaur, milk and honey.

Kaur is a Canadian writer who originally self-published milk and honey on Amazon in 2014. A year later, the book was picked up by a publisher and made its way to the New York Times bestseller list where it remained for 52 weeks.

With over a million copies sold, there's a fair chance you've seen milk and honey around somewhere:

Mimicking the self-publishing format of milk and honey, Adam and Emily used Amazon to create and publish milk and vine, a collection of poems based on famous Vines.

After it was published, Adam tweeted out a photo of the book and its contents, with a photo of milk and vine sitting in the fridge (get it?). Adam's tweet rapidly went viral and so far has almost 50,000 retweets.

On Tuesday, Adam and Emily woke to discover their book of poetry was now ranked #1 on Amazon. It's just ahead of Diary of a Wimpy Kid and the book of photographs recently released by Obama-era White House photographer Pete Souza.